
Lennox 27K33 Burner
The Lennox 27K33 Burner is a high-performance OEM in-shot burner engineered for precision combustion in Lennox gas furnaces and rooftop units. Also identified by the manufacturer part number 27K3301, this component is a direct-fit replacement designed to maintain the factory-specified air-to-gas mixture for optimal thermal efficiency. As an in-shot furnace burner, it utilizes a venturi-style design to ignite fuel within the tube, delivering a concentrated flame into the heat exchanger without the need for manual air shutter adjustments. This design minimizes carbon soot buildup and ensures a stable furnace flame pattern, which is critical for preventing premature heat exchanger fatigue. Whether you are performing a seasonal gas burner maintenance or a full burner tube replacement, using genuine Lennox furnace parts ensures HVAC equipment compatibility and restores the system to its original manifold pressure specifications. This replacement in-shot burner is built with heavy-duty aluminized steel to resist oxidation and thermal stress during high-cycle demands in residential and light commercial applications.
Key Benefits- Direct OEM Replacement: Fully compatible with Lennox 27K33 and 27K3301 specifications for seamless integration.
- Enhanced Combustion Efficiency: Engineered in-shot burner design provides a consistent, clean-burning flame to maximize AFUE ratings.
- Durable Construction: Fabricated from high-grade materials to withstand extreme thermal expansion and contraction cycles.
- Reduced Maintenance: Fixed-orifice engineering eliminates the need for field air adjustments, reducing setup time for contractors.
How do I know if my burner needs to be replaced?
Inspect for signs of "roll-out," heavy oxidation, or clogged ports. If the flame is lifting or showing significant yellow tipping that cannot be resolved by cleaning, the burner tube may be compromised.
Is the 27K33 compatible with Armstrong or Ducane units?
Yes, as a genuine Lennox part, it is frequently specified for Allied Air brands including Armstrong Air, Concord, and Ducane furnaces that utilize the same in-shot burner assembly.
Does this burner require a specific orifice?
This is the burner body only. When installing, ensure your existing brass gas orifice is cleaned and seated correctly to maintain the proper BTU input for the specific gas furnace model.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Lennox 27K33 Burner
The Lennox 27K33 Burner is a high-performance OEM in-shot burner engineered for precision combustion in Lennox gas furnaces and rooftop units. Also identified by the manufacturer part number 27K3301, this component is a direct-fit replacement designed to maintain the factory-specified air-to-gas mixture for optimal thermal efficiency. As an in-shot furnace burner, it utilizes a venturi-style design to ignite fuel within the tube, delivering a concentrated flame into the heat exchanger without the need for manual air shutter adjustments. This design minimizes carbon soot buildup and ensures a stable furnace flame pattern, which is critical for preventing premature heat exchanger fatigue. Whether you are performing a seasonal gas burner maintenance or a full burner tube replacement, using genuine Lennox furnace parts ensures HVAC equipment compatibility and restores the system to its original manifold pressure specifications. This replacement in-shot burner is built with heavy-duty aluminized steel to resist oxidation and thermal stress during high-cycle demands in residential and light commercial applications.
Key Benefits- Direct OEM Replacement: Fully compatible with Lennox 27K33 and 27K3301 specifications for seamless integration.
- Enhanced Combustion Efficiency: Engineered in-shot burner design provides a consistent, clean-burning flame to maximize AFUE ratings.
- Durable Construction: Fabricated from high-grade materials to withstand extreme thermal expansion and contraction cycles.
- Reduced Maintenance: Fixed-orifice engineering eliminates the need for field air adjustments, reducing setup time for contractors.
How do I know if my burner needs to be replaced?
Inspect for signs of "roll-out," heavy oxidation, or clogged ports. If the flame is lifting or showing significant yellow tipping that cannot be resolved by cleaning, the burner tube may be compromised.
Is the 27K33 compatible with Armstrong or Ducane units?
Yes, as a genuine Lennox part, it is frequently specified for Allied Air brands including Armstrong Air, Concord, and Ducane furnaces that utilize the same in-shot burner assembly.
Does this burner require a specific orifice?
This is the burner body only. When installing, ensure your existing brass gas orifice is cleaned and seated correctly to maintain the proper BTU input for the specific gas furnace model.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Product Information
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Description
The Lennox 27K33 Burner is a high-performance OEM in-shot burner engineered for precision combustion in Lennox gas furnaces and rooftop units. Also identified by the manufacturer part number 27K3301, this component is a direct-fit replacement designed to maintain the factory-specified air-to-gas mixture for optimal thermal efficiency. As an in-shot furnace burner, it utilizes a venturi-style design to ignite fuel within the tube, delivering a concentrated flame into the heat exchanger without the need for manual air shutter adjustments. This design minimizes carbon soot buildup and ensures a stable furnace flame pattern, which is critical for preventing premature heat exchanger fatigue. Whether you are performing a seasonal gas burner maintenance or a full burner tube replacement, using genuine Lennox furnace parts ensures HVAC equipment compatibility and restores the system to its original manifold pressure specifications. This replacement in-shot burner is built with heavy-duty aluminized steel to resist oxidation and thermal stress during high-cycle demands in residential and light commercial applications.
Key Benefits- Direct OEM Replacement: Fully compatible with Lennox 27K33 and 27K3301 specifications for seamless integration.
- Enhanced Combustion Efficiency: Engineered in-shot burner design provides a consistent, clean-burning flame to maximize AFUE ratings.
- Durable Construction: Fabricated from high-grade materials to withstand extreme thermal expansion and contraction cycles.
- Reduced Maintenance: Fixed-orifice engineering eliminates the need for field air adjustments, reducing setup time for contractors.
How do I know if my burner needs to be replaced?
Inspect for signs of "roll-out," heavy oxidation, or clogged ports. If the flame is lifting or showing significant yellow tipping that cannot be resolved by cleaning, the burner tube may be compromised.
Is the 27K33 compatible with Armstrong or Ducane units?
Yes, as a genuine Lennox part, it is frequently specified for Allied Air brands including Armstrong Air, Concord, and Ducane furnaces that utilize the same in-shot burner assembly.
Does this burner require a specific orifice?
This is the burner body only. When installing, ensure your existing brass gas orifice is cleaned and seated correctly to maintain the proper BTU input for the specific gas furnace model.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.












